Fuel-feed for hydrocarbon-engines.



PTENTED APR. 2

E. T. CABLE. FUEL FEED FOR HYDROGARBON ENGINES.

APPLICATION FILED 0CT.8.1906.

@Winsum UNITED sTATEs PATENT oEEroE.

FRANK TAYLOR CABLE, OF QUINCY, MASSACHUSETTS, ASSIGNOR TO ELEC- TRICBOAT COMPANY, OF BAYONNE, NEW JERSEY, A CORPORATION' OF NEW JERSEY,

Specification of Letters Patent.

Patented Aprilv 2, 1907.

Application filed October 8,1906. Serial No. 337,945.

T0 all whom, it may con/cern:

Be it known that I, FRANK TAYLOR CABLE, a citizen of the United States,residing at Quincy, county of Norfolk, State of Massachusetts, haveinvented certain new and useful Improvements in Fuel-Feeds forHydrocarbon-Engines; and I do hereby declare the following to be a full,clear, and exact description of the invention, such as will enableothers skilled in the art-to which it appertains to make and use thesame.

The object of the invention is to provide a simple and efficientfuel-feed mechanism for hydrocarbon engines whereby a constant supply ofliquid may be maintained in the carbureter irrespective of the speed ofthe engine.

In the accompanying drawings, Figure l is an elevation of ahydrocarbon-engine installation involving the invention. Fig. 2 is avertical section through the float-chamber and valve-casing.

In explosive-engine installations of large power or multiple units, orwhere an installation will not admit of the gravity-feed arrangementbecause of the location of the supply-tank at a lowerlevel than that ofthe carbureter, it is advantageous or necessary to supply the liquidfuel to the carbureter by means of a pump or other positive feedingmeans. The diliculty which exists in regulating such la positive feed inexact accordance with the diiierent speeds of the engine has given riseto the provision of means to take care of the overflow and prevent'thecarbureters bein flooded.

The present invention contemplates, in connection with such a positiveor power feed for the liquid Jf'uel, means to insure a constant level ofJr'uel in the carbureter at all speeds, the nature of which will beunderstood from a consideration of the accompanyin drawings and thefollowing description, w 'ch illustrate and describe the preferred'form.n

In thel accompanying drawings, E` indicates an explosive-engine of anyapproved type, which receives anex losive mixture from the carbureter a.aid carbureter may be of any of the'well #known types adapted to maltaina constant level ofgasolene 4or the like, but v.is preferably given the;

form shown in the drawings, which includes a central mixing-chamber b,surrounded by a liquid-chamberc, said chambers being connected by anupwardly-inclined duct e, controlled by a needle-valve f. The explosive'mixture of air and hydrocarbon vapor is delivered from themixing-chamber to the engine by a suitable inlet-pipe d, as will be yun-6o derstood. i

The gasolene or other liquid fuel is supplied to the carbureter from atank or reservoir h, which may be located at any con'i venient point, asupply-pipe g serving to con- 6 5 vey the liquid from the tank to thecarbureter. vConnected to the `supply-pipe g is some positive means formaintaining a constant supply of gasolene or the like, Aand saidpositive means may conveniently consist of 7o the pump, as p, drivenfrom the'shaft of the engine.

An overflow-pipe w is connected to the carbureter in proper relation tomaintain the desired depth of gasolene or the like in the A chamber c ofthe carbureter., and said overlow-pipe w is connected to a float-chamberfi, into which the liquid overflow from the carbureter is-delivered.vSaid float-chamber i is adapted to be conneected in the sup ly-pipeo gbetween the pump p and the overV ow-pipe w and for this purpose isprovided with a nipple 'i' onits bottom, which constitutes a casing fora valve r, adapted to ,close against a lower seat u or' an upper seat t,as will85 be hereinafter more particularly explained. Within the chamber'i' there is mounted a iloat j, of cork or other suitable material,which is swung from the topof the chamber t by means of suitable linksZ, which consti- 9o tute I levers of the first class, one end beingpivoted to the float and the other end engaging a collar n on the rod 7cof the valve r, sald .rod passing centrally through the float. The ycollar n is .conveniently secured to the rod lc 9 5 tions of, operationthe level of the liquid'inl the chamber c of the carbureter is to bemainroo io explosive mixture about as fast as it is delivered by thepump there will be little or no overflow' from the earbureter by way ofthe pipe yw, and consequently the float in cham- X bert will occupy itslower position, as shown l I 5 1n Fig. 2, thereby closing the valve fragainst valve-seat t and disengaging said valve from the seat u, therebyfully opening communication between the pump and the supply-tank 7l.Should the speed of the'punp increase, or Jfor zo any other reasonshould the amount of gasolene supplied to the carbureter exceed thatrequired for working the engine, the excess will overiiow by way of pipew and enter the float-chamber t'. As the overflow increases the loat y'will rise, thereby seating valve r against the lower' valve-seat u,closing communication between the pump and the supply-tank and openingup direct communica-v tion between the pumpand the float-cham- 3c ber,so that the Huid contained in the latter will be pumped by way ot theAsu }i ply-pipe g back into the carbureter and will circulate in theclosed system comprising the vsupplypipe g, chamber v oi' theearbureter, overllowpipe w, Heat-chamber yif, until the quantity of theoverflow has been so far reduced as to fail to raise the lloat j, whichwill arcordingly fall and again elevate the valve r to close the exit ofthe float-chamber and open a through- 40 passage from supply-tank h tothe pump p.

This operation is entirely automatic and insures a constant level ofgasolene in the carbureter without the least danger of flooding thesaine irrespective of the speed of the engine and the feed-pump.

The Heat-chamber 'i is conveniently provided with a vent v for carryingeti' any vapors which may collect in the chamber, and in order toobserve the height and condition 5o ef the liquid in the float-chamberthe latter may be provided with a suitable sight-glass. Having thusdescribed my invention, what I caim is- 1. "In a fuel-feeding system forhydrocarbon-engines, the combination of earbureter, a supply-pipeleading thereto, an overflowpipe leading therefrom, a supply-tank, afloat-chamber connected with the overflowpipe and with the supply-pipe,a valve operated by the loat to control the communication of thesupply-pipe with the tank and the float-chamber respectively, and meansin the supply-pipe between the float-chamber and the carbureter forforcing the liquid into the carbureter. ,y

2. In a fuel-feeding system for hydrocarbon-engines, the combination ofa constantlevel carbureter, a supply-pipe leading thereto, an overllowleading therefrom, a supplytank, a chamber connected with theoverflow-pipe and with the supply-pipe, a float in said chamber, a valveoperated by said iioat to control the eomnninication of the supplypipewith the tank and the float-chamber respectively, and a pump in thesupply-pipe between the Heat-chamber and the earbureter.

3. In a fuel-feeding system for hydrocarbon-engines, `the combination ofa constant- 0levelrarlnlrcter, a supply-pipe and an overflow-pipeconnected thereto, a supply-tank, a pump in the supply-pipe, and meansregulated by the overtlow from the carbureter for connecting thepump-inlet to the supplytank'or to the overlow-pipe.

4. In a fuel-feeding system for hydrocarbon-engines, a earbureter havinga liquidchamber and a mixing-chamber and a regulable valve between thesaid chambers, and means for maintaining a given level in theliquid-chaml:er, iomprising a supply-tank, a pipe connecting said tankwith the liquidehamber of the carbureter, an overflow-pipe connected tosaid liquid-chamber, a floatchamber conne( ted to said overflow-pipe andto said supply-pipe, a float in said floatehamlier, a valve operated bysaid float to control the communication of the supply- A pipe with' thetank and the float-chamber respectively, and a. pump in the supply-pipebetween the float-chamber and the carbureter.

In testimony whereof I al'iX my signature iiipresence of two witnesses.A

FRANK TAYLOR CABLE. /Vitnesses:

' W. D. FEsLER, F. L. BRAKE.

